Furnace for heating glass-drawing pots



Sept. 7 1926.

' 1,598,782 F. A. 0ST

FURNACE FOR HEATING GLASS DRAWING POTS Filed NOV. 15, 1924 2 Sheets-Sheet 1 IN VE/V T 01'? Sept. 7 1926.

F. A. OST

FURNACE FOR HEATING GLASS DRAWING POTS Filed Nov. 15, 1924 2 Sheets-Sheet 2 [NYE/v TOR Patented Sept. 7, 1926.

umran s'rarss FREDERICK A. ST, OFiCOFFEYVILIJE, KANSAS.

FURNACE FOR HEATING.GLASSDRAWING POTS.

Application filed November 15, 1924:.

My invention relates to improvements in furnaces for heating glass-drawing pots.

The primary object of this invention is to provide means wherebythe fuel gases in a heating furnace may be rotated in a circular motion, thereby producing an even temperature to all parts of the cavity of acpot for drawing glass.

Another object is'toprovide a removable combustion chamber for furnaces used for heating glass-drawing pots.

A further object of the invention is to provide baffles in a furnace COHEbUS -CIOH- chamber to turn the heating medium into a circular motion for heating glassdrawing ots. Other objects will hereinafter appear and, in order that the invention may be fully understood, reference will now be had-to the accompanying drawings, in which:

Fi ure 1 is a side elevation of a furnace taken on line XX of Fig. 2, the lower part being broken away, and the pot re moved.

Fig. 2 is an elevation of the device show- .ing a furnace with 2 oppositely disposed combustion chambers, one side beingbroken away .showing the interior.

Fig. 3 is an elevation on line Z-Z of Fi {l the lower part being broken away, and the pot removed.

Fig. t is a broken sideie'levation of the invention in detail showing a modified form and differenttype of burner.

Fig. shown in Fig. l but illustrating a different method of drive.

In drawing glass and using the process illustrated it is necessary to alterantely place the pots 3 in the combustion chamber of the furnace for heating and to drain the congealed glass therefrom, and also to heat the pot for the next drawing operation. In the present-day type of furnace, very little attention is paid to the burners and the combustion-chamber, with the result that the inside walls of the drawing-pots become eX- tremely uneven in temperature causing the molten glass in the horizontal pot during the drawing operation to be more plastic at one side of the pot, thereby producing a thin 7 glass in that side of the cylinder.

Referring more particularly to the draw ings in whlch 1 denotes a part of a roclra'ble me carrying a rotarydiead 2 at its i, to rotarydiead .2. secured dra 5 is an enlarged detail of the burner Serial No. 750,137.

pots 3, one of said pots 3 being inserted in Y furnace 4-, which is its normal positiointhe Furnace lias illustrated in Fig. 2 ,will disclose that a glass drawing operation can be performed at two opposite 'sides'simultaneonsly, the broken portion showing a pot 3 cross-section in its normalpositionfor heating same. 7 represents a removable hollow receptacle shown incrosssection and preferably made from refractory material with ports A and B in its sidewalls to admit the combustible gases to the inner portion" which forms a combustion-chamber 21. In the lowermost corner of said COllllJUStlOIl-Gllitllk her is located vent Y, and securedto' the [in ner part of receptacleT-are baffles 8 and .8 extending through con'ibustion-chamber 21. Passages 9 and 9' are provided to .allow glass melted from p'ots,3,to drain from the combustion-chamber 21. Burners 10 and 11 are placed tangentially to the periphery of the. combustion-chamber and in a staggered position on the sides of the furnace 4-. Another set of burners 12 and l asillus'trated by dotted lines may also be used, but to get the desired results, only burners I10 and 11 can be usedsimultaneously, or burners :12 and 18 simultaneously. ment of the burners and the balites 8 andS it will be apparent that the ,burninggasesin the -combustion-chamber will be forced into a rotary motion, thereby heating uniformly drawing-pots 3.

Referring to Fig. l which is a modified form of my invention carried out to the same result as that shown in Fig. 2, but with a different device. 1 f represents a furnace with a single combustion-chamber in the form of receptacle 15 forming said combustion-chamber and shown in cross section, and which is also preferably made from refractory material. In this device the combustible gases enter through pipe 17 held in a stationary position by bracket 1.8, from pipe 17 the combustible gases pass through burner body 19 and out at openings 20 and 20 entering the combnstion-chamber 21 as inclicated by arrows in same. The receptacle 15 is formed with a cone shaped bottom and a recess in the uppermost edge of the combustion-chamber provides space for pots 16 to be entered, pot 16. also being shown in cross "By this arran eferred form-of my invention. I reserve the opening 22'for admitting burner 19 which is revolved by chain 23 through sprocket 24 securely fastened to burner 19, driving motion to chain 23 impartedby sprocket I25 and shaft 2-6 from any suitable source not'here shown. Rotating the burner 19 may be ac complished also by using gearing as shown in a further modification in Fig. 5, in which bevel gear 27, is secured to body 19 and rotated by pinion 28. Again referring to Fig. 4 it will be seen that burner 19'is journalled on ball-bearings 29 carried' by bracket 30. By applying motion to chain 23 the burner 19 will be rotated causing the burning gases to rotate in the combustion chamber 21 thereby uniformly heating pots 16. A

WVhile I have shown and described the preright to make such changes in the constructlon, comblnatlon and'arrangement of parts as properly fall within the spirit and scope:

' of the invention as claimed.

What I claim as new and desire to secure I by Letters Patent is 1. In a furnace of the character described,-

a removable combustion-cl'iamberhaving its closed end cone-shaped, baflies in said coinbustion-chamber, burners entering thesldes of said combustion-chamber for admitting a combustible fuel against said baffles, whereby the burning fuel is given a circular motion, a 2. Ina furnace for heating glass-drawing pots, a removable combustion-chamber havpots a plurality of burners arranged to cause the burning gases to rotate therein whereby the heat is evenly distributed to said draw ing-pots. 7 4. In a furnace of the class described, a re- .movable hollow receptacle forming a comber insaid furnace a vent in the lower part of said receptacle for the escape of burnt gases and resldue glass.

6. In a furnace of the character descr bed,

glass-drawing pot-s arranged to be placed adjacent to said furnace for heating same, means within said furnace whereby the burning gases are caused to rotate in said furnace and said'pots for uniformly heating same.

7. In a furnace for heating glass-drawing pots, burners arranged to cause the burning gases to rotate in a circular motion in the combustion-chamber of said furnace, and in the cavlty of a drawing-pot when placed adjacent to said furnace.

8. In a furnace of the class described for heating glass-drawing pots, a lining for said furnace formlng a combustion-chamber hav ing a battle integral therewith for imparting a continuous rotary H10t1OIl tO'tlle burnmg gases. I

9. In a furnace of the class described,"a

combustion-chamber having a set of burners so arranged that a continuous rotary motion in one direction is imparted to'the burning gases, and another set of burners arrangedto alternately reverse the rotary motionfof the burningjgases irian opposite direction. 1 i 10. In a furnace having a combustionchamber for heating glass-drawing pots, a

J plurality of burners arranged tangentially to said combustion-chamber, whereby circular'motion is imparted to the burning gases issuing therefrom. I V V In testimony whereof, I have hereunto set my hand. 7 1

, v FREDERICK A. OST; 

